<local:MainViewModel 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"       
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WP7Square">
    
    <local:MainViewModel.Items>

    </local:MainViewModel.Items>
    
</local:MainViewModel>